ERROR opening https://cactus.nci.nih.gov/chemical/structure/Cc2ncc%28C%5Bn%2B%5D1csc%28CCO%29c1C%29c%28N%29n2/file?format=sdf&get3d=True  -- Cc2ncc%28C%5Bn%2B%5D1csc%28CCO%29c1C%29c%28N%29n2 could not be loaded.